US8733210B2 - Control apparatus for automatic transmission - Google Patents

Control apparatus for automatic transmission Download PDF

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Publication number
US8733210B2
US8733210B2 US12/938,192 US93819210A US8733210B2 US 8733210 B2 US8733210 B2 US 8733210B2 US 93819210 A US93819210 A US 93819210A US 8733210 B2 US8733210 B2 US 8733210B2
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United States
Prior art keywords
valve body
automatic transmission
wiring harness
solenoid valves
control unit
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Application number
US12/938,192
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English (en)
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US20110232409A1 (en
Inventor
Keiichiro Sueshige
Akihiro Mitani
Tatsutoshi Mizobe
Shotaro Nagai
Takenori Kawano
Takahiro Kimura
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Mazda Motor Corp
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Mazda Motor Corp
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Publication date
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Assigned to MAZDA MOTOR CORPORATION reassignment MAZDA MOTOR CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KAWANO, TAKENORI, KIMURA, TAKAHIRO, MITANI, AKIHIRO, MIZOBE, TATSUTOSHI, NAGAI, SHOTARO, SUESHIGE, KEIICHIRO
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/0003—Arrangement or mounting of elements of the control apparatus, e.g. valve assemblies or snapfittings of valves; Arrangements of the control unit on or in the transmission gearbox
    • F16H61/0006—Electronic control units for transmission control, e.g. connectors, casings or circuit boards
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/0003—Arrangement or mounting of elements of the control apparatus, e.g. valve assemblies or snapfittings of valves; Arrangements of the control unit on or in the transmission gearbox
    • F16H61/0009—Hydraulic control units for transmission control, e.g. assembly of valve plates or valve units
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19149—Gearing with fluid drive
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20012—Multiple controlled elements
    • Y10T74/20018—Transmission control
    • Y10T74/20024—Fluid actuator
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2186—Gear casings

Definitions

  • the present description relates to an automatic transmission for an automotive vehicle, and more particularly to a control apparatus for an automatic transmission.
  • a valve body In a case of an automatic transmission for an automotive vehicle, a valve body is arranged. A control valve mechanism which controls hydraulic pressures for engagement of frictional elements and other functions of the automatic transmission is installed in the valve body. It is common that a plurality of solenoid valves which actuates the control valve mechanism is attached to the valve body.
  • an electronic controller which receives signals from various sensors and outputs control signals to the solenoid valves. It is known and, for example described in U.S. Pat. No. 6,530,856B1, that an electronic controller is also arranged in the transmission case. It is described in the '856 patent that a valve body is arranged in the bottom of the transmission case, a plurality of solenoid valves and an electronic controller are attached to the valve body as well as an oil temperature sensor, a speed sensor, etc. The prior art can simplify arrangement of a wiring harness which connects the electronic controller, the solenoid valves and the sensors.
  • the electronic controller may be located so close to the solenoid valves that electromagnetic waves generated by actuation of solenoid valves affect the function of a central processing unit and other electronic parts in the electronic controller.
  • valve body Therefore, there is room to improve the arrangement of valve body, electronic controller and solenoid valves in the transmission case.
  • an automatic transmission comprising a transmission case, a valve body which is arranged in the transmission case, and a control valve mechanism which controls oil pressures in parts of the automatic transmission and is installed in the valve body.
  • the automatic transmission further comprises a solenoid valve which is attached to the valve body, and is arranged at a first side of the valve body and in the transmission case, and an electronic control unit which controls the solenoid valve, is attached to the valve body, and is arranged at a second side of the valve body that is opposite to the first side across the valve body.
  • the solenoid valve at the first side of the valve body and the electronic control unit at the second side of the valve body which is opposite to the first side, the electronic control unit is separated from the solenoid valve, and the valve body is interposed between the electronic control unit and the solenoid valve. Therefore, even without any electromagnetic shield, the electromagnetic wave generated by the actuation of the solenoid valve can be shielded by the valve body and cannot affect the electronic control unit.
  • the first and second sides may be the lower and upper sides of the valve body, respectively, and a bottom of the transmission case may be configured to cause lubricating oil to reside above the solenoid valve.
  • the solenoid valve can be in the oil and the vibration and noise generated by the activation of the solenoid valve can be absorbed with the damping effect of the lubricating oil.
  • heat generated at the solenoid valve can be released to the oil and the temperature of the solenoid valve can be more effectively controlled. Further, air is prevented from coming into the inside of the solenoid valve and more precise hydraulic control can be secured.
  • an electromagnetic sensor which detects a change of magnetic field caused by a rotational member of the automatic transmission for example one using a magnetic change detecting element such as a hall element and a semiconductor magnetic resistor element, may be arranged at the second side of the valve body opposite to the first side at which the solenoid valve is arranged. Accordingly, the valve body can decrease the affect of the magnetic field caused by the solenoid valve to the electromagnetic sensor and enhance the accuracy of the sensor measurement.
  • the automatic transmission may comprise a wiring harness which is formed in a film shape, connects the electronic control unit and the solenoid valve, and comprises an extendable portion.
  • the wiring harness which runs at a side of the valve body is in a film shape or thin and the valve body can be prevented from interfering with the transmission even when a space between the outer surface of the valve body and the inner surface of the transmission case is small. Therefore, the valve body can be more easily installed and any damage to the wiring harness caused by the interference can be prevented. Further, since the wiring harness is provided with the extendable portion, the harness may not be stretched too much in assembling it to the valve body.
  • FIG. 1 is an elevational view of a valve body according to an embodiment of the present invention.
  • FIG. 2 is a plane view of the valve body shown in FIG. 1 .
  • FIG. 3 is a bottom view of the valve body shown in FIG. 1 .
  • FIG. 4 is a left side view of the valve body shown in FIG. 1 .
  • FIGS. 1 to 4 an embodiment according to the present invention is described using the FIGS. 1 to 4 .
  • a control apparatus 1 of an automatic transmission includes a valve body 10 arranged in an inside bottom part of a transmission case A (refer to FIG. 1 ).
  • the valve body 10 is configured by laminating an upper layer member 11 , a middle layer member 12 , and a lower layer member 13 .
  • the members 11 to 13 are integrally coupled with each other by a number of bolts 14 , sandwiching separate plates (not illustrated), respectively.
  • a control valve mechanism for controlling an oil pressure of the automatic transmission is incorporated, which is constituted with a plurality of valves and oil passages.
  • a manual valve 15 configuring the mechanism includes an operation part 15 a exposed to the outside of the valve body, and is incorporated in the upper layer member 11 .
  • the manual valve 15 moves cooperatively with the operation of a gear shift lever by an operator of a vehicle concerned, and switches between the oil passages of the control valve mechanism in response to a gear range selected by the operator.
  • an electronic control unit (ECU) 20 and a sensor unit 30 are arranged in an upper surface of the upper layer member 11 of the valve body 10 .
  • the ECU 20 electronically controls the control valve mechanism according to a state of the gear range or the vehicle equipped with the automatic transmission.
  • a collected connector 22 of wiring harnesses (not illustrated) led from various sensors arranged in respective parts of the vehicle is convexly arranged in an upper surface of a main body 21 of the ECU 20 .
  • the sensor unit 30 is configured with a plurality of sensors for detecting states of respective parts of the automatic transmission, and includes rotation sensors 32 and 33 extending obliquely upward from a housing 31 of the sensor unit 30 , and a position sensor (not illustrated) accommodated in the housing 31 .
  • rotation sensors 32 and 33 and the position sensor use a hall element for detecting a change of magnetic field to output a pulse signal, respectively.
  • Tip end parts of the rotation sensors 32 and 33 and the position sensor are arranged adjacent to peripheral surfaces of two rotating members B (refer to FIG. 1 ), which configure the transmission mechanism of the automatic transmission, to detect rotation speeds of the members B based on the change of magnetic field associated with the rotations of these members B. Further, the position sensor detects the selected gear range based on the operating position of the manual valve 15 .
  • the signals from the rotation sensors 32 and 33 and the position sensor are inputted to the ECU 20 , and based on these signals and other signals indicating the states of respective parts of the vehicle inputted from the collected connector 22 , a predetermined control is performed by the ECU 20 .
  • a plurality of solenoid valves 40 such as a linear solenoid valve and an ON/OFF solenoid valve are attached to the lower layer member 13 of the valve body 10 .
  • These solenoid valves 40 are, in a state where rear parts thereof are exposed, inserted from front parts thereof into holes formed in a bottom part of the lower layer member 13 and horizontally attached to the bottom part of the lower layer member 13 .
  • a wiring harness 50 (collected wiring harnesses described above) connects the ECU 20 arranged in the upper layer member 11 of the valve body 10 and the solenoid valves 40 attached to the lower layer member 13 , respectively.
  • the wiring harness 50 is arranged so as to extend through a side of the valve body 10 and bridge between the upper layer member 11 and the lower layer member 13 .
  • independent connectors 52 of the same number as the solenoid valves 40 are provided on one side of a part of the wiring harness 50 where the part extends underneath the lower layer member 13 of the valve body.
  • the connectors 52 are connected to wiring harness connecting parts 41 provided to the solenoid valves 40 , respectively. Thereby, a control signal outputted from the ECU 20 is transmitted to each of the solenoid valves 40 via the wiring harness 50 .
  • Two independent connectors 53 and 54 are provided on the other side of the part of the wiring harness 50 where the part extends underneath the lower layer member 13 of the valve body.
  • a pressure switch 61 and an oil temperature sensor 62 attached to the lower surface of the lower layer member 13 are connected to the connectors 53 and 54 , respectively. Signals from the switch 61 and the sensor 62 are inputted to the ECU 20 via the wiring harness 50 .
  • a curved extendable portion 55 is provided in an intermediate section of the wiring harness 50 .
  • the extendable portion 55 maintains its shrunk state, while the collected connector 51 and the independent connectors 52 which are provided at both ends of the wiring harness 50 are connected to the wiring harness connecting part 23 of the ECU 20 and the wiring harness connecting parts 41 of the solenoid valves 40 .
  • the ECU 20 generates the control signal according to respective states based on the signals inputted from the sensors arranged in respective parts of the vehicle via the wiring harness (not illustrated) connected to the collected connector 22 , the signals from the rotation sensors 32 and 33 , and the position sensor of the sensor unit 30 , and the signals inputted from the pressure switch 61 and the oil temperature sensor 62 on the lower surface of the valve body 10 via the wiring harness 50 , and outputs the signal to each of the solenoid valves 40 via the wiring harness 50 . Therefore, each of the solenoid valves 40 is actuated to control the control valve mechanism or the automatic transmission according to the operating state and the like of the vehicle.
  • the ECU 20 is arranged in the upper surface of the upper layer member 11 in the valve body 10 , and the solenoid valves 40 are arranged in the lower surface of the lower layer member 13 in the valve body 10 . Therefore, the ECU 20 and the solenoid valves 40 are separated from each other, and the valve body 10 intervenes therebetween.
  • an electromagnetic wave generated due to the operation of each of the solenoid valves 40 is interrupted by the valve body 10 .
  • the influence of the electromagnetic wave on the ECU 20 can be reduced without using a shielding member or the like, and the malfunction of the ECU 20 can be suppressed.
  • the sensor unit 30 including the rotation sensors 32 and 33 , and the position sensor which use the hall elements, is also arranged in the upper surface of the upper layer member 11 of the valve body 10 . Therefore, the rotation sensors 32 and 33 , and the position sensor receive less influence of the magnetic field generated by the solenoid valves 40 arranged in the lower surface of the lower layer member 13 , and the false detection of the rotation speed and the position of the manual valve 15 caused by these sensors accidentally generating the pulse as a noise due to the change of magnetic field can be prevented.
  • the valve body 10 is arranged in the bottom part of the transmission case A, and the solenoid valves 40 are attached to the lower surface side of the lower layer member 13 . Therefore, as shown in FIG. 1 , these solenoid valves 40 are immersed in oil D inside an oil pan C attached to the bottom part of the transmission case A.
  • the wiring harness 50 connecting the ECU 20 and the solenoid valves 40 is arranged along the side of the valve body 10 from the upper surface of the upper layer member 11 of the valve body 10 where the ECU 20 is arranged to extend to the lower surface of the lower layer member 13 of the valve body 10 . Because the wiring harness 50 is formed in the film shape, when the valve body 10 is attached to the transmission case A, even if a gap between the valve body 10 and the transmission case A is small as shown in FIG. 1 , the wiring harness 50 does not interfere with the transmission case A. Thereby, the assembability of the valve body 10 can be improved, and the damage on the wiring harness 50 due to the interference and the like can be prevented.
  • the extendable portion 55 is provided in the intermediate section of the wiring harness 50 .
  • the wiring harness connecting parts 41 of the solenoid valves 40 , the oil pressure switch 61 , and the oil temperature sensor 62 the extendable portion 55 appropriately stretches, and can be arranged with some allowance, without the wiring harness 50 being forcibly pulled. Further, even when the valve body 10 expands by heat, the wiring harness 50 does not generate tension. Therefore, the damages and the like on the wiring harness 50 caused by being forcibly acted upon by tension can be prevented.
  • a so called trimming may be performed.
  • the trimming is performed, for example, in a state where each of the solenoid valves 40 is attached to the lower layer member 13 of the valve body 10 , and then the solenoid valves and the ECU 20 are connected by the wiring harness 50 .
  • each of the members 11 to 13 of the valve body 10 are then coupled, and further, the ECU 20 connected to the wiring harness 50 is attached to the upper layer member 11 .
  • the extendable portion 55 the ECU 20 can be attached without causing the tension in the wiring harness 50 .

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Transmission Device (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • General Details Of Gearings (AREA)
US12/938,192 2010-03-09 2010-11-02 Control apparatus for automatic transmission Active 2031-05-28 US8733210B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010051480A JP5365552B2 (ja) 2010-03-09 2010-03-09 自動変速機の制御装置
JP2010-051480 2010-03-09

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US20110232409A1 US20110232409A1 (en) 2011-09-29
US8733210B2 true US8733210B2 (en) 2014-05-27

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JP (1) JP5365552B2 (ja)
CN (1) CN102192310B (ja)
DE (1) DE102010051533B4 (ja)

Cited By (3)

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US20180172146A1 (en) * 2015-06-23 2018-06-21 Mazda Motor Corporation Valve body for hydraulic control device, and production method therefor
US20180180070A1 (en) * 2015-06-23 2018-06-28 Mazda Motor Corporation Valve body for hydraulic control device, and production method therefor
US11761532B2 (en) * 2019-03-11 2023-09-19 Zf Friedrichshafen Ag Hydraulic control unit for a transmission

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JP5278593B2 (ja) * 2010-03-10 2013-09-04 マツダ株式会社 自動変速機の製造方法
JP2013148203A (ja) * 2012-01-23 2013-08-01 Denso Corp 自動変速機の制御装置
CN102705557A (zh) * 2012-05-30 2012-10-03 太仓海嘉车辆配件有限公司 一种双离合器阀体
JP6152331B2 (ja) * 2013-10-23 2017-06-21 本田技研工業株式会社 変速機
EP3372871A4 (en) * 2016-02-25 2018-12-26 Aisin Aw Co., Ltd. Vehicle transmission hydraulic control device
JP6417349B2 (ja) * 2016-03-09 2018-11-07 矢崎総業株式会社 コネクタモジュール及び液圧制御装置
JP6490611B2 (ja) 2016-03-09 2019-03-27 矢崎総業株式会社 コネクタモジュール及び液圧制御装置
JP6249037B2 (ja) 2016-03-29 2017-12-20 マツダ株式会社 自動変速機及び自動変速機の製造方法
WO2017183694A1 (ja) * 2016-04-20 2017-10-26 アイシン・エィ・ダブリュ株式会社 自動変速機の油圧制御装置及びその製造方法
JP6350605B2 (ja) * 2016-07-26 2018-07-04 マツダ株式会社 作動媒体制御機構の製造方法
JP2018135920A (ja) * 2017-02-21 2018-08-30 ジヤトコ株式会社 自動変速機のコネクタ接続判定装置
DE102018009853B4 (de) * 2018-12-19 2022-12-01 Fte Automotive Gmbh Hydraulische Betätigungsvorrichtung für die Betätigung von Stellgliedern in einem Kraftfahrzeuggetriebe
DE102019208615A1 (de) * 2019-06-13 2020-12-17 Zf Friedrichshafen Ag Anordnung zumindest eines Steuerventils in einem Automatgetriebe eines Kraftfahrzeugs

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CN102192310B (zh) 2015-07-01
CN102192310A (zh) 2011-09-21
DE102010051533B4 (de) 2019-07-11
DE102010051533A1 (de) 2011-09-15
JP2011185363A (ja) 2011-09-22
US20110232409A1 (en) 2011-09-29

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